[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/paper-behaviors/test/test-radio-button.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
 <link rel="import" href="../../polymer/polymer.html">
-<link rel="import" href="../paper-inky-focus-behavior.html">
+<link rel="import" href="../paper-checked-element-behavior.html">
 <link rel="import" href="../../paper-ripple/paper-ripple.html">
 
 <dom-module id="test-radio-button">
   <style>
   :host #ink {
     position: absolute;
     top: -16px;
     left: -16px;
     width: 48px;
     height: 48px;
   }
 
   </style>
   <template>
     <div id="container">
       <paper-ripple id="ink" class="circle" center></paper-ripple>
     </div>
   </template>
 </dom-module>
 
 <script>
   Polymer({
     is: 'test-radio-button',
 
     behaviors: [
-      Polymer.PaperInkyFocusBehavior
+      Polymer.PaperCheckedElementBehavior
     ]
   });
 </script>